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Unaudited Condensed Consolidated Statements of Cash Flow (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (152,675) $ (133,657)
Adjustments to reconcile net loss to net cash used in operating activities:    
Asset impairment 22,006 15,708
Depreciation and amortization expense 42,966 56,619
Bad debt expense 19,107 22,028
Compensation expense related to share-based awards 3,311 5,119
Loss on sale of businesses, net 311 6,973
Loss on disposition of property and equipment 32 103
Changes in operating assets and liabilities (36,203) (50,735)
Net cash used in operating activities (101,145) (77,842)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of available-for-sale investments (131,487) (40,842)
Sales of available-for-sale investments 51,540 52,485
Purchases of property and equipment (10,558) (16,602)
Payments of cash upon sale of businesses (387) (2,525)
Other   31
Net cash used in investing activities (90,892) (7,453)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Issuance of common stock 575 792
Payment on borrowings   (80,000)
Change in restricted cash (674) 85,314
Payments of capital lease obligations   (210)
Net cash (used in) provided by financing activities (99) 5,896
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: 121 1,518
NET DECREASE IN CASH AND CASH EQUIVALENTS (192,015) (77,881)
DISCONTINUED OPERATIONS CASH ACTIVITY INCLUDED ABOVE:    
Add: Cash balance of discontinued operations, beginning of the period 475 128,207
Less: Cash balance of discontinued operations, end of the period 2 133,098
CASH AND CASH EQUIVALENTS, beginning of the period 318,468 112,415
CASH AND CASH EQUIVALENTS, end of the period $ 126,926 $ 29,643